There are some good ones mentioned above me & i'll add another which would top my list if sticking to the AR-15 (not 10) platform.

The 6.5 Grendel, higher bc than the 6.8 SPC, with higher sectional density to boot. The 6.5 will handle any deer (with proper bullet selection) & own any woof in short order.

The Grendel has shown to be very accurate in the right rig, I think a fella would be pleased with one.

If you go with the Grendel, make sure you can get reloading supplies for it. I was going to build a Grendel (and still plan to ) because it does perform a little better than the 6.8SPC, especially past 400yds. But finding brass and bullets is harder with the Grendel than with the 6.8. It might be getting easier to find now, but it's something to keep in mind.

__________________I like things that go "bang"... I love things that go "BOOM!"

If you go with the Grendel, make sure you can get reloading supplies for it. I was going to build a Grendel (and still plan to ) because it does perform a little better than the 6.8SPC, especially past 400yds. But finding brass and bullets is harder with the Grendel than with the 6.8. It might be getting easier to find now, but it's something to keep in mind.

Actually, I've been seeing somewhat opposite listings. Wolf makes cheap Grendel ammo, Hornady now offers ammo & brass, Lapua is offering Grendel brass & of course the Alexander Arms offerings. The Grendel is here to stay if I had to bet on it. 6.5mm bullets are everywhere, not so for the lighter 277's. IIRC Rem & SSA make SPC brass but cannot recall others...

Just food for thought.I know a few of the Grendel items are very new & most probably don't know they are out there.